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help for ^_perhs^                                                 (STB-57: sg152)
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Utility to determine names and number of right hand size variables
in regression models
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    ^_perhs^

Description
-----------

^_perhs^ returns the number of right hand side variables and their names
    for regression models.

Works with ^regress^, ^logit^, ^probit^, ^ologit^, ^oprobit^, ^mlogit^, ^tobit^,
    ^zip^, ^zinb^, ^poisson^, ^nbreg^.

Returns
-------

r(nrhs)  : local with number of rhs variables, excluding intercept.

r(rhsnms): local with names of rhs variables.

Examples within a program
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    ...
    _perhs
    local nvars = `r(nrhs)' + 1
    local varnms "`e(depvar)' `r(rhsnms)'"

    local i = 1
    while `i'<=`nvars' {
        local nmtoget : word `i' of `varnms'
        :::
        local i=`i'+1
    }

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Authors: J. Scott Long - jslong@@indiana.edu
         Jeremy Freese - jfreese@@ssc.wisc.edu
         www.indiana.edu/~jsl650/
